u should never re use a homemade piece
i know that feeling cause a month ago i was chilling with my friends and all we had was a old bong made out of a bottle, it drew ok but it had a plastic after taste to it. it made my brain feel like it was overfilled with fluid. it hurt pretty bad.
the lesson is dont reuse anything homemade (unless the homemade piece is made properly)
obviously the one you used wasent made well.